Biology, 05.06.2020 22:58 blueflu5120

Researchers discovered that the level of lead poisoning can be determined by analysis of a blood sample. This is possible because of the interaction of— A.
the muscular system and the immune system.
B.
the digestive system and the cardiovascular system.

C.
the skeletal system and the excretory system.
D.
the endocrine system and the reproductive system.

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